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[SA38594] Linux Kernel TCP RTO Calculation Denial of Service

From: Secunia Security Advisories (sec-advsecunia.com)
Date: Mon Feb 22 2010 - 17:44:14 CST

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Public Beta of CSI and WSUS Integration
http://secunia.com/blog/74

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TITLE:
Linux Kernel TCP RTO Calculation Denial of Service

SECUNIA ADVISORY ID:
SA38594

VERIFY ADVISORY:
http://secunia.com/advisories/38594/

DESCRIPTION:
A vulnerability has been reported in the Linux kernel, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error when calculating
retransmission timeouts (RTO), which can be exploited to e.g. cause a
high CPU and network load on an affected system.

Successful exploitation may require that TCP timestamps are
disabled.

The vulnerability is reported in the 2.6.32.x kernel tree.

SOLUTION:
Fixed in the GIT repository.

PROVIDED AND/OR DISCOVERED BY:
Denys Fedoryshchenko

ORIGINAL ADVISORY:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=598856407d4e20ebb4de01a91a93d89325924d43

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